On-Vehicle Inspection

3UZ-FE ENGINE CONTROL SYSTEM: THROTTLE BODY: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. CHECK THROTTLE BODY
(a) Check the throttle control motor operating sounds.
(1) Turn the ignition switch ON.
(2) When depressing the accelerator pedal, check the operating sound of the running motor. Make sure that no friction noises emit from the motor.
If friction noise exists, replace the throttle body.
(b) Check the throttle position sensor.
(1) Turn the ignition switch OFF.
(2) Connect Techstream to the DLC3.
(3) Turn the ignition switch ON.
(4) Turn the tester ON.
(5) Enter the following menus:
Select: Powertrain / Engine and ECT / Data List / Throttle Position.
(6) Depress the accelerator pedal. When the throttle valve is fully opened, check that the throttle position value is within the specification.
Standard throttle valve opening percentage:
60% or more
If the result is not as specified, check the accelerator pedal position sensor Testing and Inspection, wiring and ECM.
If the Techstream is not available, measure the voltage between the terminals (VTA1 - E2, VTA2 - E2) of the ECM connector Pinout Values and Diagnostic Parameters.